High-Efficiency Condensing
Gas Tank Water Heaters

Our most efficient gas tank water heaters for your home.

A. O. Smith’s line of high-efficiency condensing gas tank water heaters are the high performance answer for your hot water needs. These models are built to save energy with a helical heat exchanger to maximize efficiency and distribute heat more evenly than standard gas water heaters. Find out which high-efficiency condensing gas water heater is right for you.

Benefits of Condensing Gas Tank Water Heaters

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Energy Savings

High-efficiency condensing gas tank water heaters save energy and reduce the cost of operation by transferring more heat into the water.

High Efficiency

A. O. Smith high-efficiency condensing gas tank water heaters use less energy through better insulation, heat traps, more efficient burners and heat exchangers.

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Long Lasting

A. O. Smith high-efficiency condensing gas tank water heaters are built to last with limited warranties that range from 6 to 10 years to ensure that your home has hot water for years to come.

A Closer Look

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How do high-efficiency condensing gas tank water heaters work?

A. O. Smith high-efficiency condensing gas tank water heaters operate using the same technology as a standard gas storage water heater and are just as easy to install. The water heater maintains a tank of hot water available for immediate use. As hot water is drawn out of the tank, it is refilled with cold water. The electronic controls monitor the water temperature and reheat the tank when necessary.

The primary difference is that the high-efficiency condensing gas tank water heaters are designed to transfer and retain more heat into the water than a standard gas water heater. This reduces the amount of wasted heat and reduces total energy use.

Natural gas is supplied to many homes in the United States by way of underground piping. Liquid Propane (LP) is used mostly in rural areas of the country, where natural gas is not available. LP gas is usually stored in large tanks that sit in your yard. The gas is delivered to your home in a tanker truck and pumped into the tank sitting in the yard. Most A. O. Smith gas water heaters are available from the factory in either gas type liquid propane or natural gas. Both fuel sources can provide consistent hot water for your home.

Before purchasing a high-efficiency gas tank water heater, you should understand what type of fuel you currently have in your home, how much hot water you use on a daily basis, and where your current water heater is installed. A condensing water heater generally uses a different type of venting and requires a floor drain to dispose of condensate. A plumbing contractor can assist in helping you choose a water heater that fits your needs, or you can use the A. O. Smith online XPERT™ Product Selector to help determine which water heater is best for your home.

A. O. Smith high-efficiency gas tank water heaters are built similarly to standard gas tank water heaters with some modifications for higher efficiency and performance. The high-efficiency models are built with helical internal heat exchanger that keeps hot combustion gases in the tank longer to transfer more heat into the water, increasing efficiency and reducing operating cost. These models generally have higher BTU/H inputs, which means the heater can deliver more hot water.

The A. O. Smith line of high-efficiency condensing gas tank water heaters come in a range of gallon sizes and BTU/H burners. Sizing a water heater is not just dependent on the amount of water that it can store at once, but also depends on the maximum BTUs the gas burner can utilize. A. O. Smith has condensing gas tank water heaters that range from a 34- to 75-gallon (nominal) tank capacity and 76,000 BTU/H to 199,000 BTU/H. We recommend that you use the A. O. Smith online XPERT™ Product Selector to determine the exact water heater needs for your home.

Compare:
Tank gas water heater

High-Efficiency Condensing Gas Tank Water Heaters:


Proline Best logo
Tank gas water heater

Standard Non-Condensing Gas Tank Water Heaters:

GCR-50

Proline Good logo
Single Shower Length Unlimited 37 minutes
Showers Back-to-Back Unlimited 4.7 showers
Showers at the Same Time 3.5 showers 3.2 showers
Maximum Tub Size 112 gallons 87 gallons
Time to Fill Tub 7 minutes 7 minutes
Hot Water Storage Supply check_circle_outline check_circle_outline
Continuous Hot Water check_circle_outline
Energy Efficiency check_circle_outline
UEF 0.88 - 0.90 0.62
Warranty 6 - 10 Years 6 Years
*Many factors affect the actual performance of a water heater. This represents our closest approximation of your likely experience with this water heater in your local area, but actual performance may vary depending on factors beyond our ability to control or estimate.
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Additional Reading

Contractor Resources

  • Screwdriver and wrench icon.

    Installation Guide

    Download our gas tank waterheater installation instructions.

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  • Set square icon.

    Resource Guide

    Match the flow rate to your customer’s needs.

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    Cross Reference Tool

    Search for NAECA-compliant replacement options.

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